mara liasson, national public radio. syndicated columnist, charles krauthammer. obviously, tucker, good news is two americans we know are safe. we don't know about the others and there could be several owes. >> there is much we don't know. this is what we doe no. it could be a harbinger of other strategy of al-qaeda and terror groups. if you want to call disruption to the united states and west, do you halftime an airliner or disrupt the energy supply? it's easier to do the latter. there are refineries through the gulf, of course. but there is also oil producing nations across the globe that get very little attention and are key to the petroleum supply. indonesia, malaysia, nigeria, guinea. how hard would it be for the terrorist group to disrupt refining in the country and not so hard. not any country so far as i know is protected by u.s. forces. this is a major vulnerability and could be harbinger to come. >> bret: we had two chairs of committee in the house talking about this today. take a listen, the house foreign relations. >> it's clear that they began this